Bottle or jar closure.



G. HAMMER.

BOTTLE 0R JAR GLOSEIRE.

APPLICATION FILED DEO.16, 1911.

1,028,718', Y Patented June 4,1912.

a thu/nui UNITED STATES CHARLES OF BROOKLYN, NEW YORK, I OO., OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

PATENT OFFICE.

AssIeNon' To AMERICAN METAL CAP BoTTLEon. Jaa cLosUnE.

Specication of Letters Patent.

' PatndJune4,-1912.

To all whom it may concern.'

Be it known that I, CHARLES Hamnmma citizen of the United States, residing at Brooklyn, in the county vof Kings-and State of New York, haveinvented new 'and useful Improvements in Bottle or Jar Closures', of-

which the following is` -a specification.

A This invention relates to bottle or jnr .closuresof that -typeemploying metal sealing caps provided with inpunched locking projections Ato enggeseparated spiral threads upon the mou of the bottleor jar, whereby the cap is fastened .in sealing posi-l tion. 16 The` prima object-of my invent-ion is to rovide a sea g cap which may, be made of thin metal, and yet `possess maximum strength and durability, and in which the inunched locking projections are so constructed. and arranged as 'to have ga' double locking action with superposed threads upon the bottle or jar, vwhereby the eiciency'of the Aseal is increased.

A further object of the invention :is to provide a -bottle cap in which the parts are combined and arrangedto manually reinforce each other, to prevent buckling of the cap under the strain upon the vlocking projections, orcstretchin ofthe flange of the cap in application w en -the threads are of abnormal size.

The invention consists, of the features of construction, combinationand arrangement of parts, hereinafter described and claimed, reference beinghad to the accompanying drawing, in which: *Q `Figure 1 is a side elevation 'ofwa bottle neck showing the ap lication of the sealing cap; Fig. 2 lis a si :elevation of the. jar neck with the cap detached. Eig. .3, is a vertical transverse section throughone side of the jar4 and the adjacentY side .of the iange of the ca l3`ig.4` i's alio'rizontal section through t e flange of'thecap on an enlarged scale, showing one ofthe lockingp'ojections. Fi 5 is a sectional'view 'through the cap loo 'n toward the sideofthe -iange thereo ;i"

Referring to the drawing, -1J designates the neck of a bottle'or .ja'r whighmay, e of any suitable form, size,'shape laridconstruction. This neck 1 is formed adjacentA to the upper end thereof with. ari-annular rib om shoulder 2. Extending upward fromsaid ribonshouh-y vder 2 isl a 'plurality. of separated spiral .application medrec'ember 16, *1911. serial No. 666,158;

' threads 3 and 4, arranged in spaced pairs to produce intervening guide grooves 6.' The -number of pairs of threads emplo .ed may varyunder different conditions o service, but, -m the presentinstance, I" have shown Athe neck provided with four airs of threads in orderl that alocking action' may be ob- -tained atquarter points around the circum` ference of the cap. l The cap 7 is formed of thin 4sheet metal, and comprises a top or crown portion 8 provlded with a depending annular ange 9' of proper diameter to snugly embrace the threaded portion of the bottle or jar neck. This cap is adapted to be used with a suitable inner sealing disk or liner 10, andl its top or crown portion may be provided with an annular depressedrib 11 to bear against and crimp the liner for a tight sealing action against the rim edge of the neck when the cap is applied for use.

The flange 9 is formed with an annular series of outstruck vertical corrugations or milling projections 12, which serve the double function of stitening the iange and forming a roughened peripheral surface to facilitate the application of the cap to and its removal from the bottle. These corrugations terminate at ltheir upper ends below'the top of the {ia-nge and at their lower ends some distance above the lower edge ofthe flange, which latter is bent upward toform. an annular reinforcing bead13,.spaced' from the corrugations to leave an interveningplain or unsti cned surface 14. By this construction and arrangement of the eorrugations and bead... the flanges are stieed and strengthened to a maximum degree, allowingthe ea to be made of.. very tliinmetal witheut liabi itfy of its buckling or becoming distorted out o shape under pressure when appliedmand' removed. The cap is formed' with.` series of' semi- 'elliptical instruck locking projections ,1 5, 'equal in number to the pairs 'of separated threads 3 and 4 on the neck,and arranged in the construction shown equidistgntly. aroundthe circumference =of the flange. These projections are ,formed in the lain portion 14 of the ange at .the bases o adjacent corrugations. As shown, each projection is separated 4by'aslit 16 from the contiguous corrugations so as to provide va v bearing edge 17 to engage the lower surface 'of the upper thread 3. The body portion of 110 the projeetion is `longitudinally and transversely curved or rounded and is adapted to en ie the upper surface of the coacting lower "t read 4. In order to secure this double binding action Aof the locking projections upon the upper and lower threads,

the body 'Sand bearing edge of each projectionare inclinedat an angle to the horizonf tal er at anA angle corresponding to the tion and bring' the projections-in against any possibility o angle' f ,inclinatin of the threads. The semi-elliptical sh'ajl of the projections gives maximum` strengt' tion under .the pressure of the threads, and, as the projections lie between the stienf ing corrugations and stiffening bead, the strength of'said projections is further pro- ,-feiieii 'and turning in a retrograde'direction andf allowing the-seal to leak. A positive movement-of the cap in a retrograde direc- 'tionwill, however, result in the quick releaseA of the .cap,as will'be readily understood.

f It-will vbe observed that. the construction described notv only provides a cap which maybe made ofthin metal without sacrificing 'strengthfand durability, but Whichat the saine time provides for a binding action of the locking projections onthe surfaces4 o'ff'uppe'r and .lower threads, wliereby the cap is held more'securely in position and a more' perfect. and reliable sealing action see cured.

I claim asnew isz v1. A bottle cap formed of thin sheet metaland having a iiange proyidedwith a'series of`vertical stiifeningicogationa a stiffen- Having thus describedthe invention, whatA -ing' bead or'riin formed 'at `the'lower ed e of.

the ange, .and anl intervening unsti'ened portion, said unstiffened 'to'prevent their distor- As a' result, a double binding acportion being pro-l vided With a series of instruck locking projections; intersecting and reinforced by the adjacent corrugations and portions of thestiifening bead or rim, said projections be' v111g of semi-elliptical form with' theii` major axes disposed atan angle to the plane ofv lthe liange, said projections `being longitudinally and transversely curved. and inclined to the horizontal plane ofthecap and having their vupper edges separated fromthe faces ofthe projections are adapted to bind respectively upon the lower and upper sur- -flange and their lower` surfaces rounded, Vwhereby' saidedges and rounded lower surfaces of pails of coacting 'superposedspiralf threads on a receptacle.

2.- The combination with-,a receptacle hav;A

ing pail-S of spaeed SuPelPOSed separated-.j- Piml threads, cfa thin sheet metal cap 11W- mg'a flange provided with an upper corrugated'portion spaced from 'the side off't'lie in line twith the bottom facesof the upper threads, astiifening beador rim at its lower edge arranged in line with the'outer faces ofthe lower'jhreads andra'n intermediate unstifened portion disposed opposite the' I space between the threads, said unstiifened .portion being provided with instruck lock-A ing projections disposed between saidcoirjifv gations and bead and separated by s l 1ts rom the adjacent corrugations," said projections being longitudinallyand 'transver selybowed and reinforced by-the adjacent cor-Q' rugations and portions of the 'rim andbead,

the 'upper .edges 'of said locking? projections being arranged to bear againsttli'e'lowerr faces 'of the 4upper threads and the' out;

wardly 'and downwardly 'curved innerfaces; thereof arranged to -bind against the upper surfaces o f the lower threads.

In testimonfy in presence o two witnesses. --cHAnLEsHAMMEn Witnesses.' WM. F. A'. Kim'z,

T. UREN.

whereof I aix my signature.

'receptacle a distance equivalent. to the thickf-l :ness .of thethreads and terminating aboutA 7 5l 

